Discrimination, acculturative stress, alcohol use and their associations with alcohol-related consequences among Latino immigrant men.

Latino immigrant men are at increased risk for unhealthy alcohol use and related consequences due to social stressors associated with immigration. We assessed the associations of, and examined whether social stressors moderated associations between, alcohol use and alcohol-related consequences in a community-based sample of Latino immigrant men in Washington (N = 187). The mean Alcohol Use Disorders Identification Test Consumption (AUDIT-C) score was 6.3 (scores ≥ 4 indicate unhealthy alcohol use). More than half of the men (61.5%) reported experiencing discrimination in at least one setting and mean acculturative stress score was 18.3 indicating moderate levels of acculturative stress. Linear regression models were fit to assess main effects (associations between both alcohol use and social stressors and alcohol-related consequences) and moderation (whether the association between alcohol use and consequences varied based on experience of social stressors using multiplicative interaction) after adjustment for potential confounders. Alcohol use (ß = 0.47, 95% CI = 0.20-0.73; p = .001), discrimination (ß = 0.85, 95% CI = 0.27-1.43; p = .004), and acculturative stress (ß = 0.13, 95% CI = 0.02-0.24; p = .025) were all associated with increased experience of alcohol-related consequences. The association between alcohol use and alcohol-related consequences was stronger for those with high levels of acculturative stress (p = .025) but not experience of discrimination (p = .587). Findings underscore the importance of social and cultural context in alcohol use and related consequences. Efforts to reduce negative consequences of drinking may include focus on reducing exposure to discrimination and acculturative stress.

Participant engagement in a community based participatory research study to reduce alcohol use among Latino immigrant men.

Although Latino immigrant men experience many health disparities, they are underrepresented in research to understand and address disparities. Community Based Participatory Research (CBPR) has been identified to encourage participant engagement and increase representation in health disparities research. The CBPR conceptual model describes how partnership processes and study design impact participant engagement in research. Using this model, we sought to describe how these domains influenced participant engagement in a pilot randomized controlled trial of brief intervention for unhealthy alcohol use (n = 121) among Latino immigrant men. We conducted interviews with a sample of study participants (n = 25) and reviewed logs maintained by 'promotores'. We identified facilitators of participant engagement, including the relevance of the study topic, alignment with participants' goals to improve their lives, partnerships with study staff that treated participants respectfully and offered access to resources. Further, men reported that the study time and location were convenient and that they appreciated being compensated for their time. Barriers to participant engagement included survey questions that were difficult to understand and competing demands of work responsibilities. Findings suggest that engaging underserved communities requires culturally responsive and community engagement strategies that promote trust. Future studies should further investigate how CBPR partnership processes can inform intervention research.

Contextual compatibility of three empirically supported behavior therapies for cART adherence among patients with substance use disorders.

Though substance use disorders complicate adherence to combination antiretroviral therapy (cART), cognitive-behavioral therapy (CBT), contingency management (CM), and motivational interviewing (MI) each demonstrate efficacy to improve cART adherence among substance-using patients. To inform dissemination of these therapies, this mixed-method study was undertaken involving a full-day site visit to each of four HIV care settings. At each setting, an initial administrator interview elicited setting data. Paired focus groups with setting staff and patients then served as forums for open discussion and live polling of the therapies' respective contextual compatibility. Focus group recordings were subjected to a phenomenological narrative analysis by multidisciplinary investigators, and staff/patient compatibility ratings were analyzed via generalized linear models. Findings include: (1) emergent themes among staff of adaptability, patient-centeredness, and mission-congruence as desired therapy attributes, (2) emergent themes among patients of intrinsic motivation, respect for patient autonomy in illness management, and fairness among service recipients as desired therapy attributes; and (3) comparatively stronger staff perception of compatibility for MI than CBT or CM, and a similar albeit less robust or reliable pattern among patients. Collective findings support MI as a behavior therapy of choice for broad dissemination to HIV care settings to improve cART adherence of patients with substance use disorders.

Impacts of an opioid overdose prevention intervention delivered subsequent to acute care.

BACKGROUND: Opioid overdose is a major and increasing cause of injury and death. There is an urgent need for interventions to reduce overdose events among high-risk persons. METHODS: Adults at elevated risk for opioid overdose involving heroin or pharmaceutical opioids who had been cared for in an emergency department (ED) were randomised to overdose education combined with a brief behavioural intervention and take-home naloxone or usual care. Outcomes included: (1) time to first opioid overdose-related event resulting in medical attention or death using competing risks survival analysis; and (2) ED visit and hospitalisation rates, using negative binomial regression and adjusting for time at risk. RESULTS: During the follow-up period, 24% of the 241 participants had at least one overdose event, 85% had one or more ED visits and 55% had at least one hospitalisation, with no significant differences between intervention and comparison groups. The instantaneous risk of an overdose event was not significantly lower for the intervention group (sub-HR: 0.83; 95% CI 0.49 to 1.40). DISCUSSION: These null findings may be due in part to the severity of the population in terms of housing insecurity (70% impermanently housed), drug use, unemployment and acute healthcare issues. Given the high overdose and healthcare utilisation rates, more intensive interventions, such as direct referral and provision of housing and opioid agonist treatment medications, may be necessary to have a substantial impact on opioid overdoses for this high-acuity population in acute care settings. TRIAL REGISTRATION NUMBER: NCT0178830; Results.

Substance Use Research with Indigenous Communities: Exploring and Extending Foundational Principles of Community Psychology.

Many Indigenous communities are concerned with substance use (SU) problems and eager to advance effective solutions for their prevention and treatment. Yet these communities also are concerned about the perpetuation of colonizing, disorder-focused, stigmatizing approaches to mental health, and social narratives related to SU problems. Foundational principles of community psychology-ecological perspectives, empowerment, sociocultural competence, community inclusion and partnership, and reflective practice-provide useful frameworks for informing ethical community-based research pertaining to SU problems conducted with and by Indigenous communities. These principles are explored and extended for Indigenous community contexts through themes generated from seven collaborative studies focused on understanding, preventing, and treating SU problems. These studies are generated from research teams working with Indigenous communities across the United States and Canada-inclusive of urban, rural, and reservation/reserve populations as well as adult and youth participants. Shared themes indicate that Indigenous SU research reflects community psychology principles, as an outgrowth of research agendas and processes that are increasingly guided by Indigenous communities. At the same time, this research challenges these principles in important ways pertaining to Indigenous-settler relations and Indigenous-specific considerations. We discuss these challenges and recommend greater synergy between community psychology and Indigenous research.

Influence of Substance Use Disorders on 2-Year HIV Care Retention in the United States.

Substance use disorders (SUDs) are thought to predict care discontinuity, though magnitude and substance-specific variance of effects are unclear. This report of analytic work undertaken with a multi-regional American cohort of 9153 care enrollees addresses these gaps. Care retention was computed from 24-month post-linkage clinic visit documentation, with SUD cases identified from patient-report screening instruments. Two generalized estimating equations tested binary and hierarchial SUD predictors of retention, and potential effect modification by patient age-group, sex, and care site. Findings demonstrate: (1) detrimental SUD effect, equivalent to a nine percentage-point decrease in retention, with independent effects of age-group and care site; (2) substance-specific effect of marijuana UD associated with lower retention; and (3) age-modification of each effect on care discontinuity, with SUDs serving as a risk factor among 18-29 year-olds and protective factor among 60+ year-olds. Collective findings document patient attributes as influences that place particular subgroups at-risk to discontinue care.

Prevalence and Predictors of Substance Use Disorders Among HIV Care Enrollees in the United States.

Prior efforts to estimate U.S. prevalence of substance use disorders (SUDs) in HIV care have been undermined by caveats common to single-site trials. The current work reports on a cohort of 10,652 HIV-positive adults linked to care at seven sites, with available patient data including geography, demography, and risk factor indices, and with substance-specific SUDs identified via self-report instruments with validated diagnostic thresholds. Generalized estimating equations also tested patient indices as SUD predictors. Findings were: (1) a 48 % SUD prevalence rate (between-site range of 21-71 %), with 20 % of the sample evidencing polysubstance use disorder; (2) substance-specific SUD rates of 31 % for marijuana, 19 % alcohol, 13 % methamphetamine, 11 % cocaine, and 4 % opiate; and (3) emergence of younger age and male gender as robust SUD predictors. Findings suggest high rates at which SUDs occur among patients at these urban HIV care sites, detail substance-specific SUD rates, and identify at-risk patient subgroups.

Identifying HIV care enrollees at-risk for cannabis use disorder.

Increased scientific attention given to cannabis in the United States has particular relevance for its domestic HIV care population, given that evidence exists for both cannabis as a therapeutic agent and cannabis use disorder (CUD) as a barrier to antiretroviral medication adherence. It is critical to identify relative risk for CUD among demographic subgroups of HIV patients, as this will inform detection and intervention efforts. A Center For AIDS Research Network of Integrated Clinical Systems cohort (N = 10,652) of HIV-positive adults linked to care at seven United State sites was examined for this purpose. Based on a patient-report instrument with validated diagnostic threshold for CUD, the prevalence of recent cannabis use and corresponding conditional probabilities for CUD were calculated for the aggregate sample and demographic subgroups. Generalized estimating equations then tested models directly examining patient demographic indices as predictors of CUD, while controlling for history and geography. Conditional probability of CUD among cannabis-using patients was 49%, with the highest conditional probabilities among demographic subgroups of young adults and those with non-specified sexual orientation (67-69%) and the lowest conditional probability among females and those 50+ years of age (42% apiece). Similarly, youthful age and male gender emerged as robust multivariate model predictors of CUD. In the context of increasingly lenient policies for use of cannabis as a therapeutic agent for chronic conditions like HIV/AIDS, current study findings offer needed direction in terms of specifying targeted patient groups in HIV care on whom resources for enhanced surveillance and intervention efforts will be most impactful.

Differences in Tobacco Product Use Among Past Month Adult Marijuana Users and Nonusers: Findings From the 2003-2012 National Survey on Drug Use and Health.

INTRODUCTION: This study assessed differences in individual tobacco product use between past month marijuana users and nonusers, and trends in overall tobacco use and use of specific tobacco products among marijuana users. METHODS: Data were obtained from 378 459 adults participating in the 2003-2012 National Survey on Drug Use and Health, a cross-sectional, household interview survey conducted annually. Data from the most recent 2 years (2011-2012) were used to assess differences in the prevalence of various tobacco products by past month marijuana status. Data from all years were used to assess historical trends in overall tobacco use, and use of cigarettes, cigars, and blunts among marijuana users; trend significance was assessed using orthogonal polynomials. RESULTS: From 2011-2012, the prevalence of any past month tobacco use among the 9727 past month marijuana users was 68.6% excluding blunts, and 78.3% including blunts (vs. 25.3% for nonusers, P < .0001); 77.3% of past month marijuana users reported past month combusted tobacco use (vs. 23.4% of non-MJ users, P < .0001). By product, 60.1% of past month marijuana users reported past month cigarette use, 42.0% reported past month blunt use, and 20.6% reported past month cigar use. Overall, adjusted trends in past month cigarette use decreased, while trends in past month blunt use increased; cigar use did not change. DISCUSSION: Tobacco use is highly prevalent among adult marijuana users and represents an important potential comorbidity of marijuana use. In light of increasing policies legalizing marijuana, it is critical to monitor changes in overall and specific tobacco product use.

Decision-making processes as predictors of relapse and subsequent use in stimulant-dependent patients.

BACKGROUND: Decision-making processes have been posited to affect treatment outcome in addicted patients. OBJECTIVE: The present multi-site study assessed whether two measures of decision-making predicted relapse and subsequent use in stimulant-dependent patients. METHODS: A total of 160 methamphetamine- or cocaine-dependent patients participating in a multi-site clinical trial evaluating a modified 12-step facilitation intervention for stimulant-dependent patients (STAGE-12) were assessed. Decision-making processes of risk and delay (Iowa Gambling Task [IGT]) and response reversal (Wisconsin Card Sorting Task [WCST]) were obtained shortly after treatment admission followed by assessment of stimulant use over the next six months. The relationships of the IGT and WCST (Perseverative Errors) with relapse (yes/no) and days of stimulant use during the 6-month period following post-randomization were evaluated. RESULTS: Performance on the IGT and WCST did not significantly predict relapse status or time to relapse. Unexpectedly, worse performance on the IGT was associated with a fewer number of stimulant use days (p = 0.001). In contrast, worse performance on the WCST (more perseverative errors) was associated with a greater number of stimulant use days (p = 0.0003). The predictive effects of perseverative errors on subsequent use were confined to methamphetamine-dependent and Minority participants. CONCLUSIONS: Decision-making processes, as measured in the current study, do not uniformly predict relapse or subsequent use. A decrease in the salience attribution of non-drug reinforcers may explain the positive relationship between IGT performance and post-relapse use. More comprehensive and global measures of impulsiveness may better assess relapse risk and use.

Community perspectives on drug/alcohol use, concerns, needs, and resources in four Washington State Tribal communities.

Community-university teams investigated substance use, abuse, and dependence (SUAD) and related concerns, needs, strengths, and resources in four Washington State Tribal communities. A total of 153 key community members shared their perspectives through 43 semi-structured interviews and 19 semi-structured focus groups. Qualitative data analysis revealed robust themes: prescription medications and alcohol were perceived as most prevalent and concerning; family and peer influences and emotional distress were prominent perceived risk factors; and SUAD intervention resources varied across communities. Findings may guide future research and the development of much needed strength-based, culturally appropriate, and effective SUAD interventions for American Indians, Alaska Natives, and their communities.

Student peer mentoring: Feasibility and acceptability of mHealth-based tool for alcohol and substance abuse prevention by peer mentors at a university in Kenya.

OBJECTIVE: The use of mobile health (mHealth)-based interventions for the prevention of alcohol and other psychoactive substances use is an emerging practice for which new evidence is required. This study evaluated the feasibility and acceptability of a mHealth-based peer mentoring tool for early screening, brief intervention, and referral of students who abuse alcohol and other psychoactive substances. It compared the implementation of a mHealth-delivered intervention to the paper-based practice that is the standard at the University of Nairobi. METHODS: A quasi-experimental study using purposive sampling was used to select a cohort of n = 100 (51 experimental, 49 control) first-year student peer mentors on two campuses of the University of Nairobi in Kenya. Data were collected on the mentors' sociodemographic characteristics as well as the feasibility and acceptability of the interventions by way of, the magnitude of reach, feedback to investigators, referral of cases, and perceived ease of use. RESULTS: The mHealth-based peer mentoring tool scored high with 100% of users rating it as feasible and acceptable. Among the two study cohorts, there were no differences in the acceptability of the peer mentoring intervention. When comparing the feasibility of the peer mentoring practice, actual use of the interventions, and intervention reach, the mHealth-based cohort mentored four mentees for every one mentored by the standard practice cohort. CONCLUSION: The mHealth-based peer mentoring tool had high feasibility and acceptability among student peer mentors. The intervention provided evidence for the need to expand the availability of screening services for alcohol and other psychoactive substances use among students in the university and promote the appropriate management practices within and outside the university.

The Cultural Adaption of a Sobriety Support App for Alaska Native and American Indian People: Qualitative Feasibility and Acceptability Study.

BACKGROUND: Despite high rates of alcohol abstinence, Alaska Native and American Indian (ANAI) people experience a disproportionate burden of alcohol-related morbidity and mortality. Multiple barriers to treatment exist for this population, including a lack of culturally relevant resources; limited access to or delays in receiving treatment; and privacy concerns. Many ANAI people in the state of Alaska, United States, live in sparsely populated rural areas, where treatment access and privacy concerns regarding peer-support programs may be particularly challenging. In addition, prior research demonstrates that many ANAI people prefer a self-management approach to sobriety, rather than formal treatment. Taken together, these factors suggest a potential role for a culturally adapted smartphone app to support ANAI people interested in changing their behavior regarding alcohol use. OBJECTIVE: This study was the first phase of a feasibility and acceptability study of a culturally tailored version of an off-the-shelf smartphone app to aid ANAI people in managing or reducing their use of alcohol. The aim of this qualitative needs assessment was to gather insights and preferences from ANAI people and health care providers serving ANAI people to guide feature development, content selection, and cultural adaptation before a pilot test of the smartphone app with ANAI people. METHODS: From October 2018 to September 2019, we conducted semistructured interviews with 24 ANAI patients aged ≥21 years and 8 providers in a tribal health care organization in south-central Alaska. RESULTS: Participants generally endorsed the usefulness of a smartphone app for alcohol self-management. They cited anonymity, 24/7 access, peer support, and patient choice as key attributes of an app. The desired cultural adaptations included ANAI- and land-themed design elements, cultural content (eg, stories from elders), and spiritual resources. Participants considered an app especially useful for rural-dwelling ANAI people, as well as those who lack timely access to treatment services or prefer to work toward managing their alcohol use outside the clinical setting. CONCLUSIONS: This needs assessment identified key features, content, and cultural adaptations that are being implemented in the next phase of the study. In future work, we will determine the extent to which these changes can be accommodated in a commercially available app, the feasibility of implementation, and the acceptability of the culturally adapted version of the app among ANAI users.

Substance use, treatment admissions, and recovery trends in diverse Washington State tribal communities.

BACKGROUND: Qualitative and quantitative data and participatory research approaches might be most valid and effective for assessing substance use/abuse and related trends in American Indian and Alaska Native (AIAN) communities. METHOD: Twenty-nine federally recognized AIAN tribes in Washington (WA) State were invited to participate in Health Directors (HD) interviews and State treatment admissions data analyses. Ten Tribal HD (or designees) from across WA participated in 30-60-minute qualitative interviews. State treatment admissions data from 2002 to 2008 were analyzed for those who identified with one of 11 participating AIAN communities to explore admission rates by primary drug compared to non-AIANs. Those who entered treatment and belonged to one of the 11 participating tribes (n = 4851) represented 16% of admissions for those who reported a tribal affiliation. RESULTS: Interviewees reported that prescription drugs, alcohol, and marijuana are primary community concerns, each presenting similar and distinct challenges. Additionally, community health is tied to access to resources, services, and culturally appropriate and effective interventions. Treatment data results were consistent with interviewee-reported substance use/abuse trends, with alcohol as the primary drug for 56% of AIAN adults compared to 46% of non-AIAN, and other opiates as second most common for AIAN adults in 2008 with 15% of admissions. LIMITATIONS: Findings are limited to those tribal communities/community members who agreed to participate. CONCLUSION: Analyses suggest that some diverse AIAN communities in WA State share similar substance use/abuse, treatment, and recovery trends and continuing needs. SCIENTIFIC SIGNIFICANCE: Appropriate and effective research with AIAN communities requires respectful and flexible approaches.

Rates and influences of alcohol use disorder comorbidity among primary stimulant misusing treatment-seekers: meta-analytic findings across eight NIDA CTN trials.

BACKGROUND: There is need to improve treatment effectiveness for stimulant misusers, and one means of doing so is by tailoring services to account for common diagnostic comorbidities and psychosocial challenges they face. OBJECTIVES: Using its publicly available datasets, this CTN-approved secondary analysis project examined prevalence of alcohol use disorders (AUDs) among primary stimulant misusing treatment-seekers as well as impact of AUD comorbidity on their pre-treatment psychosocial functioning. METHODS: Upon identifying a primary stimulant misuser subsample (N = 1133) from among aggregated treatment-seekers across eight CTN trials, diagnostic data were used to document lifetime AUD rates. Paired comparisons, stratified by stimulant drug type (e.g., amphetamine, cocaine) then tested the influence of AUD comorbidity on psychosocial indices from the Addiction Severity Index - Lite. RESULTS: A high AUD rate (45%) was found in this client population. Among primary cocaine misusers, those with AUD were more likely to: (i) show elevated Addiction Severity Index composite scores, (ii) perceive greater importance of drug treatment, and (iii) endorse psychiatric symptoms and perceived need for their treatment. Among primary amphetamine misusers, those with AUD were more likely to endorse specific psychiatric symptoms. CONCLUSION: Study findings document AUD comorbidity as a fairly common diagnostic feature of primary stimulant misusers, and suggest it is a pervasive influence on the pre-treatment psychosocial functioning of cocaine misusers. SCIENTIFIC SIGNIFICANCE: This study demonstrates the utility of CTN common assessment battery for secondary analysis projects, though challenges noted during its conduct highlight the value of consistent data collection and documentation within and across CTN trials.

Research partnerships between academic institutions and American Indian and Alaska Native Tribes and organizations: effective strategies and lessons learned in a multisite CTN study.

BACKGROUND: Community Based and Tribally Based Participatory Research (CBPR/TPR) are approaches that can be successful for developing ethical and effective research partnerships between academic institutions and Tribes and Native organizations. OBJECTIVES: The NIDA Clinical Trials Network funded a multi-site, exploratory study using CBPR/TPR to begin to better understand substance abuse issues of concern to some Tribes and Native organizations as well as strengths and resources that exist in these communities to address these concerns. Attention was paid to the development and maintenance of research partnerships in each of the sites. METHODS: Each of the five partnerships is briefly described and common as well as unique challenges and successes are identified. RESULTS: A summary of the common themes for developing these collaborative research efforts is provided. CONCLUSION: True, collaborative research partnerships require a great deal of time and effort in order to develop mutual trust, understanding, knowledge, and collaboration that will guide research that is rigorous as well as ethical, effective, and culturally appropriate. SCIENTIFIC SIGNIFICANCE: As AIAN communities become increasingly sophisticated partners in, and consumers of, research, CBPR and TPR are emerging as effective, ethical, culturally appropriate, and acceptable approaches. This can serve to improve the science we engage in with AIAN communities, add to the scarce literature regarding AIAN communities, and better serve AIAN communities in addressing health disparities and improving health.

Site selection in community-based clinical trials for substance use disorders: strategies for effective site selection.

BACKGROUND: The importance of conducting substance use disorder treatment research in real-world settings is now well recognized. While this approach to clinical trials research offers a variety of benefits, challenges also arise. Selecting high-quality sites to participate is critical to recruitment, retention, and overall trial performance when conducting multi-site, community-based clinical trials of treatments for substance use disorders. OBJECTIVES: Over the past 10 years, the National Institute on Drug Abuse-sponsored National Drug Abuse Treatment Clinical Trials Network (CTN) has strived to conduct high-quality, well-managed clinical trials. This includes developing methods for site selection to be used by investigators conducting CTN trials. METHODS: We review site selection strategies from two community-based multi-site clinical trials conducted under the auspices of the National Drug Abuse Treatment Clinical Trials Network. RESULTS: Issues relevant to site selection include the clinical trial design, availability of appropriate clinical population, and organizational attributes of potential clinical research sites. Site selection strategies include reviewing regional epidemiologic data, collecting standard site selection surveys, evaluating clinic data on existing patient populations, and site selection interviews and visits. CONCLUSION: This article describes considerations for selecting research sites and identifies specific strategies to employ when selecting community-based sites for participation in clinical trials.

How practice and science are balanced and blended in the NIDA Clinical Trials Network: the bidirectional process in the development of the STAGE-12 protocol as an example.

BACKGROUND: Bidirectional, collaborative partnerships between academic researchers and practitioners have been a fundamental vehicle to achieve the National Institute on Drug Abuse (NIDA) Clinical Trials Network (CTN) goal of improving outcomes of community-based drug treatment. These partnerships blend clinical perspectives of practitioners and methodological expertise of researchers working together to address clinically meaningful issues through randomized clinical trials conducted in community treatment settings. OBJECTIVES: Bidirectionality is a guiding principle of the CTN, but its operationlization at the practical level in protocol development and implementation has not been articulated. This descriptive article presents the development of one protocol as an example and model of this bidirectional, collaborative, iterative partnership between researchers and practitioners. METHODS: This article illuminates several specific issues encountered while developing STAGE-12, a behavioral intervention to facilitate 12-step mutual support group involvement, as well as the rationale for decisions taken to resolve each. RESULTS: The STAGE-12 protocol was successfully developed through a series of decisions taking into account both design factors and clinical practice needs and realities, thus maintaining a balance between methodological rigor and generalizability. CONCLUSION: The review demonstrates the process by which research and practice have been blended in protocol development, exemplifying the underlying principle of bidirectionality, a key element in the success of the NIDA CTN. SCIENTIFIC SIGNIFICANCE: Bidirectional partnerships as derived in the CTN, employing a hybrid model of efficacy-effectiveness research, are capable of designing and implementing protocols that are both methodologically rigorous and clinically meaningful, thus increasing likelihood of adoption and eventual improvement in public health.

Design of NIDA CTN Protocol 0047: screening, motivational assessment, referral, and treatment in emergency departments (SMART-ED).

BACKGROUND: Medical settings such as emergency departments (EDs) present an opportunity to identify and provide services for individuals with substance use problems who might otherwise never receive any form of assessment, referral, or intervention. Although screening, brief intervention, and referral to treatment models have been extensively studied and are considered effective for individuals with alcohol problems presenting in EDs and other medical settings, the efficacy of such interventions has not been established for drug users presenting in EDs. OBJECTIVES: This article describes the design of a NIDA Clinical Trials Network protocol testing the efficacy of an screening, brief intervention, and referral to treatment model in medical EDs, highlighting considerations that are pertinent to the design of other studies targeting substance use behaviors in medical treatment settings. METHODS: The protocol is described, and critical design decisions are discussed. RESULTS: Design challenges included defining treatment conditions, study population, and site characteristics; developing the screening process; choosing the primary outcome; balancing brevity and comprehensiveness of assessment; and selecting the strategy for statistical analysis. CONCLUSION: Many of the issues arising in the design of this study will be relevant to future studies of interventions for addictions in medical settings. SCIENTIFIC SIGNIFICANCE: Optimal trial design is critical to determining how best to integrate substance abuse interventions into medical care.

A comparison of methods for estimating change in drinking following alcohol treatment.

BACKGROUND: The ultimate goal of alcohol treatment research is to develop interventions that help individuals reduce their alcohol use. To determine whether a treatment is effective, researchers must then evaluate whether a particular treatment affects changes in drinking behavior after treatment. Importantly, drinking following treatment tends to be highly variable between individuals and within individuals across time. METHOD: Using data from the COMBINE study (COMBINE Study Group, 2003), the current study compared 3 commonly used and novel methods for analyzing changes in drinking over time: latent growth curve (LGC) analysis, growth mixture models, and latent Markov models. Specifically, using self-reported drinking data from all participants (n = 1,383, 69% male), we were interested in examining how well the 3 estimated models were able to explain observed changes in percent heavy drinking days during the 52 weeks following treatment. RESULTS: The results from all 3 models indicated that the majority of individuals were either abstinent or reported few heavy drinking days during the 52-week follow-up and only a minority of individuals (10% or fewer) reported consistently frequent heavy drinking following treatment. All 3 models provided a reasonably good fit to the observed data with the latent Markov models providing the closest fit. The observed drinking trajectories evinced discontinuity, whereby individuals seem to transition between drinking and nondrinking across adjacent follow-up assessment points. The LGC and growth mixture models both assumed continuous change and could not explain this discontinuity in the observed drinking trajectories, whereas the latent Markov approach explicitly modeled transitions between drinking states. CONCLUSIONS: The 3 models tested in the current study provided a unique look at the observed drinking among individuals who received treatment for alcohol dependence. Latent Markov modeling may be a highly desirable methodology for gaining a better sense of transitions between positive and negative drinking outcomes.